Q. No.Assertion: Some animals, particularly ruminants and termites, can digest cellulose.
Reason: They can produce cellulose.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
It is said that elemental composition of living organisms and that of inanimate objects (like earth’s crust) are similar in the sense that all the major elements are present in both. Then, what would be the difference between these two groups? Choose a correct answer from among the following:
| 1. | Living organisms have more gold in them than inanimate objects. |
| 2. | Living organisms have more water in their body than inanimate objects. |
| 3. | Living organisms have more carbon, oxygen and hydrogen per unit mass than inanimate objects. |
| 4. | Living organisms have more calcium in them than inanimate objects. |
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Many elements are found in living organisms either free or in the form of compounds. One of the following is not, found in living organisms.
1. Silicon
2. Magnesium
3. Iron
4. Sodium
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Amino acids, as the name suggests, have both an amino group and a carboxyl group in their structure. In addition, all naturally occurring amino acids (those which are found in proteins) are called L-amino acids. From this, can you guess from which compound can the simplest amino acid be made?
| 1. | Formic acid | 2. | Methane |
| 3. | Phenol | 4. | Glycine |
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Many organic substances are negatively charged e.g., acetic acid, while others are positively charged e.g., ammonium ion. An amino acid under certain conditions would have both positive and negative charges simultaneously in the same molecule. Such a form of amino acid is called
| 1. | Positively charged form | 2. | Negatively charged form |
| 3. | Neutral form | 4. | Zwitter ionic form |
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Sugars are technically called carbohydrates, referring to the fact that their formulae are only multiples of C(H2O). Hexose therefore has six carbons, twelve hydrogen and six oxygen atoms. Glucose is a hexose. Choose from among the following another hexose.
| 1. | Fructose | 2. | Erythrose |
| 3. | Ribulose | 4. | Ribose |
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When you take cells or tissue and grind them with an acid in a mortar and pestle, all the small biomolecules dissolve in the acid. Proteins, polysaccharides and nucleic acids are insoluble in mineral acid and get precipitated. The acid soluble compounds include amino acids, nucleosides, small sugars etc. When one adds a phosphate group to a nucleoside, one gets another acid soluble biomolecule called
| 1. | Nitrogen base | 2. | Adenine |
| 3. | Sugar phosphate | 4. | Nucleotide |
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When we homogenize any tissues in an acid the acid soluble pool represents
| 1. | Cytoplasm | 2. | Cell membrane |
| 3. | Nucleus | 4. | Mitochondria |
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The most abundant chemical in living organisms could be
1. Protein
2. Water
3. Sugar
4. Nucleic acid
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A homopolymer has only one building block called monomer repeated ‘n’ number of times. A heteropolymer has more than one type of monomers. Proteins are heteropolymers made of amino acids. While a nucleic acid-like DNA or RNA is made of only 4 types of nucleotide monomers, proteins are made up of
1. 20 types of monomers
2. 40 types of monomers
3. 3 types of monomers
4. Only one type of monomer
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